Pretty much edited from the manual.....
Coin and Jewelry Mode - Coin and Jewelry Icons
Center Position "Primary Searching" (traditional DISC control) . With the Trigger on the hand grip in the center position, the DISC control works like most traditional metal detectors in that metal items below the DISC control setting are suppressed (quiet or broken) by the audio and metal items accepted by the DISC control setting produce a smoother solid audio beep.
Forward Position (Alternate Mode) "Pull Tab Range Notched Out (suppressed)". With the Trigger on the hand grip in the forward position, the typical pull tab range is rejected (notched out) regardless of the DISC controls position. If you are accepting foil an or nickels, pull tabs above that setting on the DISC control range are still suppressed (quiet or broken) by the audio.
Relic Mode - Relic Icons
Center Position "Primary" "Two Tone ID" (disc accept high tone, reject low tone). While operating in the Relic MODE with the Trigger in Center Position, targets below the DISC control setting produce a low tone beep, targets above the DISC control setting produce a higher toned beep. Two different tones, lower trash/rejects, higher good metals/accept, all based on the DISC control setting. Edgy target responses are normal for this mode as it technically is a Mixed Mode with all metal and Disc working simultaneously.
Forward Position (Alternate Mode) "DISC Suppresses Rejects" (at "0" DISC iron low tone/non-iron high tone). While operating in the Relic mode with the Trigger in the forward position, and the DISC control set at any setting other than Zero (0) , metals below the Disc setting are suppressed (quiet or broken) and metals above the DISC setting produce a smoother solid beep. With the trigger forward and the DISC control set to ZERO, however, ferrous metals (iron) produces a lower pitch beep and nonferrous metals (not iron) produce a higher pitch beep.
Hope that helps.